Which of the Following Represents an Experiment

Multiple Choice

Which of the following represents an experiment?

A) Two groups of participants (those who are left-handed and those who are right-handed) are asked to perform a speeded cognitive task to compare performance for the two groups.
B) Participants take a handedness questionnaire with score indicating the degree of right- and left-handedness to look for a relationship between handedness score and time to complete a cognitive task.
C) Participants are randomly assigned to conditions where a cognitive task is given with speeded or non-speeded instructions to determine if there is an effect of instruction type of task performance.